• 대한통합의학회지
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• 제10권3호
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• pp.13-25
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• 2022

Purpose : The purpose of this study was to investigate the effects of combined cervical stabilization exercise (CSE) and stretching exercise (SE) on office workers with forward head posture (FHP). Methods : A total of 32 office workers with forward head posture were randomly assigned to experimental (n=16) and control (n=16) groups. The experimental group underwent combined CSE and SE, and the control group underwent cervical self-myofascial release and SE. Both groups performed exercises for 40 min per day, thrice per week for a total of 6 weeks. Craniovertebral angle (CVA), respiration, disability, and joint range of motion (ROM) before and 6 weeks after intervention were measured and compared. Results : There was no significant between-group difference in the general characteristics (p>.05). The intra-group comparison showed significant differences in the visual analog scale (VAS) and neck disability index (NDI) of both groups post-intervention (p<.05). CVA and forced expiratory volume in 1 seconds (FEV₁) were significantly improved post-intervention in the experimental group only (p<.05). In the experimental group, all ROM variables were significantly improved post-intervention. In contrast, in the control group, all ROM variables improved significantly post-intervention, except for extension (p<.05). The inter-group comparison showed significant differences in NDI, left lateral flexion, right lateral flexion, and left rotation between the two groups (p<.05). Conclusion : The combination of CSE and SE, which stabilizes the cervical spine, had positive effects on cranial rotation angle, respiration, disability, and joint ROM in office workers with forward head posture. Therefore, the combination of the two exercises may be an effective option to reduce symptoms and prevent postural problems in office workers with FHP.

• 태양에너지
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• 제10권1호
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• pp.80-91
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• 1990

1985년도에 체신부에서는 태양열 우체국사를 체신부 산하 각청마다 시범적으로 1개국씩 건립하였는데, 건립된 우체국사 전부 자연형 태양열 시스템을 적용하였다. 이후 '89년까지 전국에 26개 자연형 태양열 우체국사가 건립되어 우리나라에 있어서 자연형 태양열 공공건물의 영역을 확대시키는데 획기적인 계기가 되었다. 따라서 본고에서는 이제까지 건립된 자연형 태양열 우체국사의 문제점을 실태조사 등을 통해 파악하여 이들 문제점을 단계적 해결을 위한 접근 방향을 모색하고, 이와 더불어 보다 열성능이 향상되고, 업무환경이 개선된 자연형 태양열 우체국사의 본격적 건립에 필요한 기초자료를 제공하고자 한다.

• 한국지능시스템학회논문지
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• 제15권6호
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• pp.701-708
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• 2005

사서함 구조에서 메시지 서비스를 위한 중요한 구조적 메커니즘은 메시지 객체들을 콘텐츠에 따라 그룹 클래스 계층 구조를 구성하는 것이다. 본 논문에서는 응용 도메인에서 많은 구조적인 메시지 객체들을 클러스터링하기 위한 $\alpha$-cut 기반의 genealogy 그룹화 방법을 제안한다. 제안된 방법은 의미적 유사 관계와 퍼지 유사 관계를 이용하여 관계성을 결정하고 search() insert(), hierarchy()의 연산을 이용하여 그룹화 구조를 수행한다. 이러한 구조는 그룹과 관련된 작업을 쉽게 처리해주고 질의응답 객체 식별, 유사성 발견 등을 쉽게 해준다. 따라서 제안된 사서함 구조는 그룹화 생성을 통해서 사용자들에게 메시지객체를 효율적으로 서비스하고 관리하는 기능을 제공한다. 그리고 제안된 기법의 성능을 알아보기 위해 5600개의 메시지 객체를 이용하여 non-grouping, BGM, RGM, OGM 방법과 비교 분석한다.

• 정보처리학회논문지B
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• 제11B권6호
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• pp.709-716
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• 2004

최근에 인터넷과 통신망의 활성화로 인하여 특정 도메인 정보들을 효율적으로 구축하고 서비스하기 위한 여러 가지 방법들이 제안되고 있다. 본 논문에서는 멀티미디어 통계 사서함 구축을 위한 퍼지 필터링 객체 관련성 기법을 제안한다 제안된 기법은 S-cut을 이용하여 문서 객체들을 그룹화하기 위해 RelCRO( $D_{omain}$, Gi), RelSRO( $D_{omain}$, Gi), FAS를 이용한다. 또한 제안된 기법의 성능을 알아보기 위해 1600개의 멀티미디어 타입정보를 이용하여 실험을 수행하고 랜덤 키, OGM, 그리고 제안된 방법을 비교 분석한다. 그 결과 제안된 방법의 성능이 보다 효율적임을 보인다.

• 정보처리학회논문지B
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• 제8B권5호
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• pp.501-506
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• 2001

최근에 인터넷과 통신망의 활성화로 인하여 멀티미디어 정보들을 효율적으로 관리하고 서비스하기 위한 여러 가지 방법들의 제안되고 있다. 본 논문에서는 퍼지 기반의 멀티미디어 사서함 구축을 위한 객체관리기로서 $\alpha$-cut 을 이용한 FBOM을 제안한다. 제안된 시스템은 퍼지 필터링을 이용하여 객체들을 고나리하기 위해 객체 분류, 퍼지 필터링, 클래스 생성구조를 이용한다. 또한 제안된 시스템의 성능을 알아보기 위해 1000개의 멀티미디어 정보를 이용하여 실험을 수행하고, 랜덤 키 방법과 FBOM 방법을 비교 분석한다.

• 한국실내디자인학회논문집
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• 제29호
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• pp.188-194
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• 2001

Increasing the user's need in the building facilities, the architects, engineers, and building managers must consider the user's opinion when they plan and construct the buildings. When planning and managing of the buildings, accepting the user's opinion is desirable and indispensible to solve the Problems about the architectural facilities between suppliers and users. To supply the efficient working environments, use the check listing tools and operate the post occupancy evaluation. The real estate and development company is selected for the evaluation. It is renovated in 2000 to fit in its working environment. The process of the evaluation is proceeded both private and group working spaces and facility and management of the buildings with 10 categories. Following the result of Post occupancy evaluation, the users of the building are mostly satisfied with their working environments after the renovation. However, the categories in thermal environment and indoor air and supply for office work need to be improved in advance.

• Animal Bioscience
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• 제36권12호
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• pp.1821-1830
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• 2023

Objective: This study investigated the effect of adding seminal plasma to frozen-thawed semen on the quality of sperm and pregnancy following insemination in dromedary camels. Methods: In experiment 1, the frozen-thawed semen from 9 collections (3 bulls) was further diluted with either the base extender or homologous seminal plasma (HSP). In the second experiment, a pooled sample of frozen-thawed semen was diluted with either seminal plasma from another three bulls. Live percentage, total and progressive motility, functional and acrosome integrity, and sperm kinematics were evaluated at 15, 60, and 120 minutes post-thawing and compared to the non-treated control. In experiment 3, frozen semen was used to inseminate camels in the following experimental groups: 1-Single insemination with double dose undiluted frozen semen (n = 9); 2-Re-insemination in 6 hours with undiluted semen (n = 13); 3-Single insemination with HSP treated sperm (n = 14). Results: Frozen-thawed sperm diluted in HSP or the non-homologous seminal plasma from Bull C indicated an improvement in all parameters after 1 hour post-thawing incubation (p<0.05). The proportion of total and progressively motile sperm did not drop significantly at 60 minutes post-thawing when diluted with the seminal plasma of Bull C (p>0.05). Double insemination with nontreated sperm and single insemination with HSP-treated sperm resulted in similar pregnancy rates (15.3% vs 21.4%, p>0.05). None of the camels conceived with double-dose single insemination of nontreated sperm. Conclusion: Seminal plasma improves sperm longevity and motility after thawing in dromedary camel with a significant between-bull variation in effect. Low post-thaw sperm longevity might be the cause behind the low pregnancy rates in frozen semen insemination of dromedary camels.

• Journal of Astronomy and Space Sciences
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• 제38권3호
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• pp.185-192
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• 2021

This technical paper deals the practical transformation algorithms between several lunar reference frames which will be used for Korea pathfinder lunar orbiter (KPLO) flight operation. Despite of various lunar reference frame definitions already exist, use of a common transformation algorithm while establishing lunar reference frame is very important for all members related to KPLO mission. This is because use of slight different parameters during frame transformation may result significant misleading while reprocessing data based on KPLO flight dynamics. Therefore, details of practical transformation algorithms for the KPLO mission specific lunar reference frames is presented with step by step implementation procedures. Examples of transformation results are also presented to support KPLO flight dynamics data user community which is expected to give practical guidelines while post processing the data as their needs. With this technical paper, common understandings of reference frames that will be used throughout not only the KPLO flight operation but also science data reprocessing can be established. It is expected to eliminate, or at least minimize, unnecessary confusion among all of the KPLO mission members including: Korea Aerospace Research Institute (KARI), National Aeronautics and Space Administration (NASA) as well as other organizations participating in KPLO payload development and operation, or further lunar science community world-wide who are interested in KPLO science data post processing.

• Restorative Dentistry and Endodontics
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• 제49권2호
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• pp.14.1-14.13
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• 2024

This study aimed to answer the question through a systematic review: Can carbamide peroxide be as effective as hydrogen peroxide and cause less in-office bleaching sensitivity? A literature survey was performed in PubMed/MEDLINE, Embase, Scopus, ISI Web of Science, and gray literature. Primary clinical trials that compared the efficacy or the in-office bleaching sensitivity between carbamide and hydrogen peroxides were included. The risk of bias was evaluated using the RoB2. The certainty of the evidence was assessed using the GRADE approach. DPI training significantly improved the mean scores of the dental undergraduates from 7.53 in the pre-DPI-training test to 9.01 in the post-DPI-training test (p < 0.001). After 6 weeks, the mean scores decreased marginally to 8.87 in the retention test (p = 0.563). DPI training increased their confidence level from 5.68 pre-DPI training to 7.09 post-DPI training. The limited evidence suggests that the 37% carbamide peroxide may be similarly effective to the 35% hydrogen peroxide for bleaching teeth in-office and causes less bleaching sensitivity. However, more well-designed split-mouth clinical trials are necessary to strengthen the evidence.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권8호
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• pp.2732-2748
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• 2021

In post-COVID-19 pandemic era, students' learning effects and experience may sharply decrease when teaching is transferred from offline to online. Several tools suitable for online teaching have been developed to guarantee and promote students' learning effects. However, they cannot fully consider teacher-student interaction in online teaching. To figure out this issue, this paper proposes integrated media platform-based virtual office hours implementation for online teaching. Specifically, an integrated media platform (IMP) is first constructed. Then, virtual office hours (VOH) is implemented based on the IMP, aiming at increasing student-teacher interactions. For evaluating the effectiveness of this scheme, 140 undergraduate students using IMP are divided into one control group and three experimental groups that respectively contain text, voice and video modes. The experiment results indicate that applying VOH in the IMP can improve students' online presence and test scores. Furthermore, students' participating modes during VOH implementation can largely affect their degree of presence, which can be well classified by using principal component analysis. The implication of this work is that IMP-based VOH is an effective and sustainable tool to be continuously implemented even when the COVID-19 pandemic period ends.